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Analog Devices Inc./Maxim Integrated MAX473EPA+
- Part No.:
- MAX473EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX473EPA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:342
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Product details
Overview
MAX473EPA+ from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier optimized for single-supply operation from +2.7V to +5.25V. It delivers 10MHz unity-gain bandwidth, 15V/µs minimum slew rate, 600Ω output drive capability, and rail-to-rail swing within ±50mV of both supply rails - enabling precision signal conditioning in battery-powered portable instrumentation.
For engineers reviewing the MAX473EPA+ datasheet, MAX473EPA+ pinout, MAX473EPA+ application, or MAX473EPA+ equivalent, this page provides verified electrical parameters, temperature-rated performance (–40°C to +85°C), DIP-8 package details, and validated alternative op amps for legacy design support and obsolescence mitigation.
Technical Context
The MAX473EPA+ employs a bipolar input stage with input bias current flowing out of both IN+ and IN– terminals, requiring matched source impedances to minimize offset error. Its unity-gain stable architecture supports noninverting and inverting configurations without external compensation.
It features internal short-circuit protection and operates across full industrial temperature range (–40°C to +85°C) with guaranteed 10MHz bandwidth and 15V/µs slew rate at VCC = 3V and 5V. Input common-mode range extends to the negative rail (VEE), and output swings to within 50mV of VEE and VCC under 600Ω load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +5.25V single supply - enables direct interface with 3.3V and 5V logic and ADCs without level-shifting. |
| Unity-Gain Bandwidth | 10MHz (guaranteed) - supports high-fidelity amplification up to ~1MHz for small-signal AC applications. |
| Slew Rate | 15V/µs min - ensures ≤700ns settling time to 0.1% for 1V step, suitable for fast pulse conditioning. |
| Input Offset Voltage | ±2.5mV max (–40°C to +85°C) - maintains accuracy in precision DC-coupled sensor front-ends. |
| Output Drive | 600Ω load capability - drives low-impedance filters, cables, or ADC reference buffers without gain loss. |
| Rail-to-Rail Output | Swings to within 50mV of VEE and VCC - maximizes dynamic range in single-supply systems with limited headroom. |
| Supply Current | 2.0mA to 3.6mA per amplifier (–40°C to +85°C) - balances speed and power for portable equipment. |
Pinout & Package
MAX473EPA+ is housed in an 8-pin plastic DIP package (0.300" wide), compatible with through-hole prototyping and legacy industrial PCBs. Pin numbering follows standard IC orientation with notch or dot marking Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - delivers rail-to-rail voltage with 600Ω drive strength; requires isolation resistor for >100pF capacitive loads. |
| 2 | IN– | Inverting input - bias current flows *out*; match source impedance to IN+ to cancel offset error. |
| 3 | IN+ | Noninverting input - bias current flows *out*; use series resistor (R3 = R1||R2) in noninverting config to balance input currents. |
| 4 | VEE | Negative supply pin - connect to ground in single-supply mode; sets lower bound of input common-mode and output swing. |
| 5 | NULL | Offset null terminal - connect 2kΩ potentiometer wiper to VEE and ends to Pins 1 & 8 for manual VOS trimming (only on MAX473). |
| 6 | VCC | Positive supply pin - bypass with 0.1µF ceramic capacitor close to Pin 6 to ensure stability and channel separation >120dB. |
| 7 | NULL | No-connect - not internally bonded; leave unconnected and unstubbed to avoid parasitic coupling. |
| 8 | NULL | Offset null terminal - second terminal of trim potentiometer; completes VOS adjustment path with Pin 5 and VEE. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Reaches within 50mV of VEE and VCC under 600Ω load - preserves >97% of available voltage range in 3.3V systems. |
| Input includes negative rail | Common-mode range extends to VEE - enables direct sensing of ground-referenced signals without level-shifting. |
| Short-circuit protected output | Withstands indefinite output short to VEE or VCC - improves reliability in test fixtures and fault-prone interfaces. |
| Unity-gain stable | No external compensation required in buffer or gain ≥1 configurations - simplifies layout and reduces BOM count. |
| Industrial temperature grade | Specified from –40°C to +85°C - qualified for deployment in embedded controllers, industrial sensors, and automotive body electronics. |
Applications
| Portable Equipment | Battery-Powered Instruments |
|---|---|
|
Use Scenario: Signal amplification in handheld multimeters and portable oscilloscopes powered by two AA cells (3V nominal). IC Role / Device Role / Timing Role: Single-supply op amp configured as unity-gain buffer and active filter stage for analog front-end. Use Value: Rail-to-rail output and 2mA quiescent current extend battery life while preserving full-scale measurement range. |
Use Scenario: Sensor signal conditioning in portable gas analyzers using electrochemical sensors with mV-level outputs. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with offset trimming (Pins 1/5/8) to maintain sub-mV baseline accuracy over temperature. Use Value: ±2.5mV max VOS and rail-to-rail input enable direct amplification of low-output sensors without external biasing. |
| Signal Conditioning | Discrete Filters |
|
Use Scenario: Amplifying and level-shifting output of MEMS accelerometers before ADC sampling in edge IoT nodes. IC Role / Device Role / Timing Role: Noninverting amplifier (G = 10) driving SAR ADC reference input with low noise and fast settling. Use Value: 15V/µs slew rate ensures <700ns settling to 0.1%, supporting high-speed sampling without aperture jitter penalty. |
Use Scenario: Building 2nd-order active bandpass filter (fo = 190kHz, Q = 10) for ultrasonic transducer receive path. IC Role / Device Role / Timing Role: One-quarter of MAX475 used as transimpedance and gain stage; MAX473EPA+ serves as identical replacement in single-channel variant. Use Value: Guaranteed 10MHz GBW and 63° phase margin ensure stable filter response without peaking or ringing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-supply, rail-to-rail output op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVR | Lower 1MHz GBW, 1V/µs slew rate, but rail-to-rail I/O and 0.85mA IQ; SOT-23-5 package only. | Not suitable for >100kHz signal paths or fast settling; better for ultra-low-power sensor buffers where bandwidth <100kHz suffices. | Select when power budget <1mA is critical and bandwidth requirements are relaxed; verify layout compatibility with SOT-23 footprint. |
| TLV2461CDR | 10MHz GBW and 1.6V/µs slew rate; rail-to-rail output but not input; 650µA IQ; SO-8 package. | Lacks rail-to-rail input - cannot handle signals near ground without level shift; output swing still reaches within 70mV of rails. | Choose for cost-sensitive industrial designs needing 10MHz bandwidth and SO-8 compatibility, accepting input common-mode limitation. |
Compared with MAX473EPA+, LMV321IDBVR trades bandwidth and slew rate for lower power and smaller size, while TLV2461CDR retains bandwidth but sacrifices input rail-to-rail capability - making MAX473EPA+ uniquely suited for precision, wide-dynamic-range single-supply signal chains where both input and output swing matter.
Availability
MAX473EPA+ is available at Aetrix Electronics and suitable for portable equipment, battery-powered instruments, and signal conditioning applications requiring stable component supply amid ongoing obsolescence management.
Supply support for MAX473EPA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX473/MAX474/MAX475 family was designed to deliver high-speed, rail-to-rail performance in single-supply portable systems - addressing the need for precision amplification without dual supplies or complex bias networks.
FAQ
What is the operating temperature range for MAX473EPA+?
The MAX473EPA+ is rated for industrial temperature operation from –40°C to +85°C. This is confirmed in the Ordering Information table, where "E" suffix denotes the –40°C to +85°C grade. All electrical specifications in the datasheet's "TA = –40°C to +85°C" section apply directly to MAX473EPA+ under these conditions.
Is MAX473EPA+ pin-compatible with other MAX473 variants like MAX473CPA or MAX473ESA?
Yes - MAX473EPA+ shares identical 8-pin DIP pinout with MAX473CPA (0°C to +70°C) and MAX473ESA (–40°C to +85°C, SO-8). However, package type differs: MAX473EPA+ uses plastic DIP, while MAX473ESA uses SO-8. PCB layout must match the physical package; no electrical or functional differences exist between same-package variants.
Does MAX473EPA+ support offset voltage trimming, and how is it implemented?
Yes - MAX473EPA+ provides dedicated offset null pins (Pins 1 and 8) for manual VOS adjustment. A 2kΩ potentiometer is connected with its wiper to VEE (Pin 4) and its ends to Pins 1 and 8. This configuration allows trimming of input offset voltage down to near-zero, a feature unique to the single-amplifier MAX473 (not available on MAX474/MAX475).
Can MAX473EPA+ drive capacitive loads, and what is the recommended approach?
MAX473EPA+ is unity-gain stable but degrades phase margin with capacitive loads >100pF. For loads up to 390pF, stability is maintained with 10kΩ || 20pF; for >1000pF, add a 10Ω isolation resistor in series with the output (per Figure 4 in datasheet). This preserves 63° phase margin and prevents overshoot or ringing in filter or cable-driving applications.
Why is MAX473EPA+ marked "Not Recommended for New Designs"?
MAX473EPA+ is marked "Not Recommended for New Designs" because it was manufactured using a wafer process no longer available at Maxim's external foundry. While fully functional and supported for existing designs, Maxim advises new projects to evaluate modern alternatives (e.g., MAX44260, ADA4807) offering improved PSRR, lower noise, or smaller packages - though none replicate the exact combination of 10MHz GBW, 15V/µs slew rate, and DIP-8 offset-trimmable form factor.
MAX473EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX473EPA+ FAQ
1.How can I place an order for MAX473EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX473EPA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX473EPA+ reliable?
The price and inventory of MAX473EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX473EPA+ is usually 5 days.
3.What payment methods are accepted for MAX473EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX473EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX473EPA+?
MAX473EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX473EPA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX473EPA+?
For technical support, including MAX473EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX473EPA+ requirements.
6.How does Aetrix verify that MAX473EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX473EPA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX473EPA+ meets industry standards.
7.What is the process for return or replacement of MAX473EPA+?
All MAX473EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX473EPA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX473EPA+ part is unused and in its original packaging.
Return procedure for MAX473EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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